[Asterisk-Users] Issues with ringing on FXS ports

[Rich Adamson]

> Ok... I've done a bit of emperical testing but don't really know what the results mean. I'm 
starting to think I need an oscilloscope to measure this properly. All I have is a DMM, I'm 
measuring on both the AC and DC scales...
> 
>               AC Measurement            DC Measurement
> On-hook       107V                               49V
> Off-hook       11V                                6V
> Ring             drops to 44V                    0V
> 
> Does this make any sense to anyone?

DC measurements are fine; AC is not even reasonable (in the US).